They access their backups to avoid paying the ransom, only to discover all the backups have been deleted. One of the first things that an organisation does when it has been compromised is to go to the backup system and restore the data, especially if they’ve fallen victim to ransomware. The second mistake that companies make is not to protect their backups.
There are specific technical controls that can be implemented and updated that will help companies to resolve this issue and ensure that their firewalls are configured for minimum required access and best practice in terms of network segregation.” “This isn’t a great realisation when you’ve just had your entire system locked down or have to pay hefty fines for being in breach of regulations. “Often people realise that just one rule change could have slowed down or prevented the attack,” says Potgieter. This draws a thick black line under the importance of consistent firewall audits and regular assessment of all firewall rules. Gaps and vulnerabilities appeared, and most companies didn’t even realise they were there, until it was too late. Many firewalls that went into the pandemic were not customised to handle the complexities that it introduced in the shape of remote working. The common firewall problem is simple – the rules get old and dated and companies don’t audit them often enough.
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Once an attacker gets a foothold within a network if there is unrestricted outbound access, they have the freedom they need to download malicious payloads and exfiltrate data and download tools for their attack,” says Potgieter. “The first is to ensure that the company firewall is filtering outbound traffic as aggressively as it is filtering inbound traffic.